/*
 *  Copyright 2007 Blandware (http://www.blandware.com)
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
package com.blandware.atleap.webapp.action.core.sequenceItem;

import com.blandware.atleap.webapp.action.core.BaseAction;
import com.blandware.atleap.webapp.util.core.WebappConstants;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * <p>Forward to the page with list of sequence items.
 * </p>
 * <p><a href="ListSequenceItemsAction.java.html"><i>View Source</i></a></p>
 * <p/>
 *
 * @author Roman Puchkovskiy <a href="mailto:roman.puchkovskiy@blandware.com">
 *         &lt;roman.puchkovskiy@blandware.com&gt;</a>
 * @version : $Revision: 1.2 $ : 2007/12/17 13:38:25 $
 * @struts.action path="/core/sequenceItem/list"
 * name="sequenceItemForm"
 * validate="false"
 * roles="core-sequenceItem-list"
 * @struts.action-forward name="viewSequence"
 * path="/core/sequence/view.do"
 * redirect="true"
 */
public final class ListSequenceItemsAction extends BaseAction {
	/**
	 * @param mapping  The ActionMapping used to select this instance
	 * @param form     The optional ActionForm bean for this request (if any)
	 * @param request  The HTTP request we are proceeding
	 * @param response The HTTP response we are creating
	 * @return an ActionForward instance describing where and how
	 *         control should be forwarded, or null if response
	 *         has already been completed
	 */
	public ActionForward execute(ActionMapping mapping, ActionForm form,
	                             HttpServletRequest request, HttpServletResponse response) throws Exception {

		if ( request.getSession().getAttribute(WebappConstants.SEQUENCE_ID_KEY) == null ) {
			if ( log.isWarnEnabled() ) {
				log.warn("Missing sequence ID. Returning to index...");
			}
			return mapping.findForward("admin");
		}

		// save transaction token in request
		saveToken(request);
		return mapping.findForward("viewSequence");
	}
}